<!DOCTYPE html>
<html lang="en">

<head>
    <meta charset="UTF-8">
    <script type="text/javascript" src="../assets/js/vue.js"></script>
    <title>v-on事件监听器</title>
</head>

<body>
    <h1>v-on 事件监听器</h1>
    <hr>
    <div id="app">
        本场比赛得分： {{count}}
        <br/>
        <button v-on:click="jiafen">加分</button>
        <button v-on:click="jianfen">减分</button>
        <hr> 
        <input type="text" v-on:keyup.enter="onEnter" v-model="secondCount">
    </div>

    <script type="text/javascript">
        var app = new Vue({
            el: '#app',
            data: {
                count: 1,
                secondCount: 1
            },
            methods: {
                jiafen: function () {
                    this.count++;
                },
                jianfen: function () {
                    this.count--;
                    if (this.count < 0) {
                        this.count = 0;
                    }
                },
                onEnter: function () {
                    this.count = this.count + parseInt(this.secondCount);
                }
            }
        })
    </script>
</body>

</html>